U.S. patent number 8,579,604 [Application Number 13/030,731] was granted by the patent office on 2013-11-12 for floating apparatus for scroll compressors.
This patent grant is currently assigned to Industrial Technology Research Institute. The grantee listed for this patent is Yu-Choung Chang, Chi-Hsing Chen, Shu-Er Huang, Kun-Yi Liang, Yueh-Ju Tang, Chun-Chung Yang. Invention is credited to Yu-Choung Chang, Chi-Hsing Chen, Shu-Er Huang, Kun-Yi Liang, Yueh-Ju Tang, Chun-Chung Yang.
United States Patent |
8,579,604 |
Liang , et al. |
November 12, 2013 |
Floating apparatus for scroll compressors
Abstract
An improved floating apparatus for scroll compressors is
disclosed, which is a multi-function device integrating a
temperature protection mechanism, a pressure protection mechanism
and a backflow-proof mechanism and therefore substantially is a
floating seal member with overheating protection, high pressure
protection and backflow-proof capabilities. In detail, the present
disclosure provides a floating apparatus for scroll compressors
that not only can be manufactured easily, but also capable of
distributing the acting force resulting from the gliding block for
providing better sealing effect while preventing the scroll
compressors from being damaged by high temperature and high
pressure.
Inventors: |
Liang; Kun-Yi (Hsinchu County,
TW), Chang; Yu-Choung (Hsinchu County, TW),
Huang; Shu-Er (Hsinchu, TW), Yang; Chun-Chung
(Hsinchu, TW), Chen; Chi-Hsing (Hsinchu County,
TW), Tang; Yueh-Ju (Hsinchu, TW) |
Applicant: |
Name |
City |
State |
Country |
Type |
Liang; Kun-Yi
Chang; Yu-Choung
Huang; Shu-Er
Yang; Chun-Chung
Chen; Chi-Hsing
Tang; Yueh-Ju |
Hsinchu County
Hsinchu County
Hsinchu
Hsinchu
Hsinchu County
Hsinchu |
N/A
N/A
N/A
N/A
N/A
N/A |
TW
TW
TW
TW
TW
TW |
|
|
Assignee: |
Industrial Technology Research
Institute (Hsinchu, TW)
|
Family
ID: |
46199581 |
Appl.
No.: |
13/030,731 |
Filed: |
February 18, 2011 |
Prior Publication Data
|
|
|
|
Document
Identifier |
Publication Date |
|
US 20120148433 A1 |
Jun 14, 2012 |
|
Foreign Application Priority Data
|
|
|
|
|
Dec 9, 2010 [TW] |
|
|
99142952 A |
|
Current U.S.
Class: |
417/410.5;
417/308; 417/292 |
Current CPC
Class: |
F04C
28/28 (20130101); F04C 28/265 (20130101); F04C
18/0253 (20130101); F04C 27/005 (20130101); F04C
18/0215 (20130101); F04C 29/0035 (20130101) |
Current International
Class: |
F04B
17/00 (20060101) |
Field of
Search: |
;417/410.5,292,307,308
;418/55.1-55.6 |
References Cited
[Referenced By]
U.S. Patent Documents
Other References
Wang, Scroll machine using floating seal with backer; Feb. 2008.
cited by applicant .
Wang, Jun ; Li, Chao ; Ma, Xiaoli ; Liu, Xingwang ; Liu, Zhenquan,
Experiment investigation of lubricating oil sealing in working
chamber of scroll compressor; Science Press; Mar. 2006. pp.
100-104. cited by applicant .
Peng, Bin; Li, Chao ; Liu, Zhenquan, Seal investigation of natural
gas invert scroll compressor; Science Press; 2005, pp. 107-110,
Issued: Nov. 2005. cited by applicant .
Liu, Y.a , Hung, C.a , Chang, Y.b, Mathematical model of bypass
behaviors used in scroll compressor; Date: May 23, 2008. cited by
applicant .
Chen Rong, Wang Wen, Discussion on leaking characters in
meso-scroll compressor; Elsevier, ScienceDirect; 2009.02.009; pp.
1433-1441. cited by applicant .
Taiwan Patent Office, "Office Action", Aug. 28, 2013. cited by
applicant.
|
Primary Examiner: Bertheaud; Peter J
Assistant Examiner: Kasture; Dnyanesh
Attorney, Agent or Firm: WPAT, PC King; Justin
Claims
What is claimed is:
1. A scroll compressor with an improved floating apparatus,
comprising: a frame, comprising: a high-pressure zone; and a
low-pressure zone; a scroll pair, disposed inside said low-pressure
zone; a floating apparatus, movably disposed on top of said scroll
pair between said high-pressure zone and said low-pressure zone,
forming a high-pressure chamber and a medium-pressure chamber,
wherein said medium-pressure chamber is in communication with said
low-pressure zone and said high-pressure chamber is in
communication with said high-pressure zone; a backflow-proof unit,
mounted on said floating apparatus and disposed between said
high-pressure zone and said high-pressure chamber; a pressure
protection unit, mounted inside said floating apparatus, wherein
said pressure protection unit enables fluid communication between
said medium-pressure chamber and said low-pressure zone in response
to a pressure of said medium-pressure chamber; and a temperature
protection unit, mounted inside said floating apparatus, wherein
said temperature protection unit enables fluid communication
between said medium-pressure chamber and said low-pressure zone in
response to a temperature of said medium-pressure chamber.
2. The scroll compressor with improved floating apparatus of claim
1, further comprising a partition block disposed between, and
separating, said high-pressure zone and said low-pressure zone,
said partition block further comprising: a partition block via
hole; and a seal mounting surface.
3. The scroll compressor with improved floating apparatus of claim
2, wherein said floating apparatus further comprises a gliding
block, comprising: a high-pressure via hole, with said
backflow-proof unit disposed therein; a plurality of radial side
holes, in communication with said high-pressure via hole; and a
ring flange mounting surface, extending axially, and coaxial to
said high-pressure via hole; whereina top of said gliding block is
disposed though said partition block via hole within said
high-pressure zone, said seal mounting surface is disposed to
engage with said rind flame mounting surface; and said pressure
protection unit and said temperature protection unit are disposed
respectively at two sides of said gliding block.
4. The scroll compressor with improved floating apparatus of claim
3, wherein said floating apparatus further comprises: a first
sealing element, disposed adjacent to said scroll pair and
encircling a bottom of said high pressure via hole, separating said
high-pressure chamber and said medium-pressure chamber; and a
second sealing element, disposed about a periphery of said scroll
pair, separating said medium pressure chamber and said low pressure
zone.
5. The scroll compressor with improved floating apparatus of claim
4, wherein said first sealing element comprises a pressure-relief
groove and said second sealing elements comprises a pressure-relief
groove.
6. The scroll compressor with improved floating apparatus of claim
3, wherein said backflow-proof unit comprises a baffle, and said
gliding block further comprises a flange element disposed at the
top of said high-pressure via hole, wherein said flange element
prevents said backflow proof unit from exiting said high pressure
via hole.
7. The scroll compressor with improved floating apparatus of claim
6, wherein said flange element is C-shaped.
8. The scroll compressor with improved floating apparatus of claim
3, wherein said gliding block further comprises: a first
medium-pressure passages, in communication with said low-pressure
zone and said medium-pressure chamber; and a second medium-pressure
passage, in communication with said low-pressure zone and said
medium-pressure chamber; wherein said pressure protection unit is
disposed in said first medium-pressure passage, and said
temperature protection unit is disposed in said second
medium-pressure passage.
9. The scroll compressor with improved floating apparatus of claim
8, wherein said temperature protection unit comprises: a block
ring; and a disk-like valve element, disposed inside said second
medium-pressure passage.
10. The scroll compressor with improved floating apparatus of claim
8, wherein said pressure protection unit comprises: a block
element, with a stair-shaped hole in communication with said
low-pressure zone; a spherical-shape element, disposed inside said
first medium-pressure passage; and an elastic element, disposed
inside said block element, wherein a first end of said elastic
element abuts against an inner wall of said stair-shaped hole and a
second end of said elastic element abuts against said
spherical-shape element.
11. The scroll compressor with improved floating apparatus of claim
10, wherein said elastic element comprises a spring.
12. The scroll compressor with improved floating apparatus of claim
1, wherein the scroll pair comprises: a rotary scroll; and a fixed
scroll, arranged on top of and convoluting said rotary scroll, and
comprising: a discharge port, centrally disposed on said fixed
scroll, in communication with said high-pressure chamber; a
receiving recess, centrally disposed atop said fixed scroll,
wherein said high-pressure chamber is disposed between said
receiving recess and said floating apparatus; a ring flange,
disposed on top of said fixed scroll, wherein said medium-pressure
chamber is disposed between said floating apparatus and said ring
flange; and a third medium-pressure passage, in communication with
said medium-pressure chamber.
13. The scroll compressor with improved floating apparatus of claim
1, wherein said temperature protection unit comprises a temperature
responsive valve.
14. The scroll compressor with improved floating apparatus of claim
1, wherein said pressure protection unit is comprises a pressure
relief valve.
15. The scroll compressor with improved floating apparatus of claim
1, wherein said frame further comprises bracket, disposed beneath
said scroll pair.
Description
TECHNICAL FIELD
The present disclosure relates to an improved floating apparatus
for scroll compressors, and more particularly, to a multi-function
device integrating a temperature protection mechanism, a pressure
protection mechanism and a backflow-proof mechanism.
TECHNICAL BACKGROUND
It has been discovered that one of the unique features of scroll
compressors is that it is ease to overheat while operating under
abnormal conditions, such as operating under a compression ratio
exceeding its specification, poor heat dissipation from its system
condenser, blocked fan, clogged piping or the likes.
For preventing scroll compressors from being damaged by the
aforesaid conditions, one known method is to design an apparatus in
the scroll compressors that is specifically used for causing a
low-pressure working fluid to flow toward a high-pressure zone,
or/and causing a medium-pressure working fluid to a high-pressure
zone when any of the aforesaid excessive temperature conditions is
encountered, so as to protect scroll compressors from overheating.
There are already many such apparatuses available today, such as
those disclosed in U.S. Pat. Nos. 5,141,407, 6,267,565, and
7,338,265.
In detail, each of the U.S. Pat. Nos. 5,141,407 and 6,267,565
teaches an apparatus for protecting scroll compressors from high
temperature problems, and the U.S. Pat. No. 7,338,265 teaches an
apparatus for protecting scroll compressors from high pressure
problems, according to that the apparatuses disclosed in U.S. Pat.
Nos. 5,141,407 and 6,267,565 are not able to protect scroll
compressors from being damaged by high pressure, and the apparatus
disclosed in U.S. Pat. No. 7,338,265 is not able to protect scroll
compressors from being damaged by high temperature. Thus, there are
still a lot to be improved in those apparatuses disclosed in U.S.
Pat. Nos. 5,141,407, 6,267,565, and 7,338,265.
Moreover, most current available scroll compressor is configured
with a gliding block at the center thereof, which is designed to be
driven to move by the pressure variation in the scroll compressor
for allowing a high-pressure fluid to flow into a high-pressure
chamber while preventing the same from leaking toward a
low-pressure chamber as the scroll compressor is actuated. In
addition, the aforesaid gliding block further comprises a
backflow-proof element for reducing high-pressure backflow and thus
preventing damage to the scroll pair of the scroll compressor.
However, as the acting force of the aforesaid gliding block design
will concentrate to the center of the corresponding scroll pair,
resulting that the contact area between the gliding block and the
scroll pair is very small, the sealing between the gliding block
and the scroll pair is not satisfactory.
In addition, the backflow-proof element formed in the gliding block
is substantially a blind hole having a valve plate disposed
therein. However, in reality, such blind hole design will cause the
difficulty for machining a gliding block to increase.
TECHNICAL SUMMARY
The object of the present disclosure is to provide an improved
floating apparatus for scroll compressors, which is ease to
process, capable of distributing the acting force resulting from
the gliding block for providing better sealing effect, and capable
of preventing the scroll compressors from being damaged by high
temperature and high pressure.
To achieve the above object, the present disclosure provides a
scroll compressor with improved floating apparatus, comprising: a
frame, being divided into a high-pressure zone and a low-pressure
zone; a scroll pair, received inside the low-pressure zone; a
floating apparatus, disposed on top of the scroll pair while
enabling a high-pressure chamber and a medium-pressure chamber to
be formed therebetween in a manner that the medium-pressure chamber
is connected in communication with the low-pressure zone and the
high-pressure chamber is connected in communication with the
high-pressure zone; a backflow-proof unit, mounted on the floating
apparatus while being disposed at a position between the
high-pressure zone and high-pressure chamber; a pressure protection
unit, mounted on the floating apparatus while being disposed inside
the medium-pressure chamber; and a temperature protection unit,
mounted on the floating apparatus while being disposed inside the
medium-pressure chamber; wherein, the high-pressure zone and the
low-pressure zone is being separated from each other by a partition
block; and the frame is further configured with a bracket that is
disposed at the bottom of the scroll pair.
In an exemplary embodiment of the present disclosure, the floating
apparatus further comprises: a gliding block, being arranged for
enabling the top thereof to be positioned inside the high-pressure
zone while being configured with a high-pressure via hole and a
plurality of radial side holes that are connected in communication
with the high-pressure via hole. Thereby, the backflow-proof unit
is disposed inside the high-pressure via hole while enabling the
pressure protection unit and the temperature protection unit to be
positioned respectively at two opposite sides of the gliding block.
Moreover, the gliding block is further configured with two
medium-pressure passages, each being connected in communication
with the low-pressure zone, in a manner that one of the two
medium-pressure passages is provided for receiving the pressure
protection unit while allowing the same to be positioned between
the medium-pressure chamber and the low-pressure zone, and another
medium-pressure passage is provided for receiving the temperature
protection unit while allowing the same to be positioned between
the medium-pressure chamber and the low-pressure zone.
In another exemplary embodiment of the present disclosure, the
partition block is formed with a via hole at the center thereof,
which is provided for the top of the gliding block to insert
therethrough; and moreover, the partition block is formed with a
seal mounting surface and the gliding block is formed with a ring
flange mounting surface that is coaxially arranged with the axis of
the high-pressure via hole while extending axially, and seal
mounting surface can be arranged for selectively enabling the same
to engage with and detach from the ring flange mounting
surface.
In another exemplary embodiment of the present disclosure, the
scroll pair is composed of a fixed scroll and a rotary scroll, that
are arranged convoluting each other while enabling a low-pressure
suction inlet, that is connected in communication with the
low-pressure zone, to be formed therebetween.
In another exemplary embodiment of the present disclosure, the
fixed scroll is formed with a discharge port at a position on top
of the hub thereof in a manner that the discharge port is connected
in communication with the low-pressure suction inlet and the
high-pressure chamber; and moreover, the fixed scroll is formed
with a receiving recess at a position on top of the hub thereof,
that is provided for receiving the floating apparatus therein so as
to enable the high-pressure chamber to be formed between the
gliding block and the receiving recess. In addition, the fixed
scroll is formed with a ring flange at a position on top of the hub
thereof, that is used for enabling the medium-pressure chamber to
be formed between the gliding block and the ring flange; and also
the fixed scroll is formed with a medium-pressure passage in a
manner that the medium-pressure passage is connected in
communication respectively with the medium-pressure chamber and the
low-pressure suction inlet.
In another exemplary embodiment of the present disclosure, the
temperature protection unit is substantially a temperature
responsive valve, composed of a block ring and a disk-like valve
element in a manner that the ring block is arranged at a position
corresponding to a first pressure passage while the disk-like valve
element is disposed inside the medium-pressure passage.
In another exemplary embodiment of the present disclosure, the
pressure protection unit is substantially a pressure relief valve,
composed of a block element, an elastic element and a
spherical-shape element, in which the block element is formed with
a stair-shaped hole that is connected in communication with the
low-pressure zone; the elastic element is disposed inside the block
element while enabling an end of the elastic element to abut
against the inner wall of the stair-shaped hole and another end
thereof to abut against the spherical-shape element; and the
spherical-shape element is disposed inside the medium-pressure
passage. It is noted that the elastic element can be a spring.
In another exemplary embodiment of the present disclosure, an end
of the gliding block where the high-pressure via hole is formed is
disposed inside the high-pressure chamber and has a first sealing
element disposed thereat; and there is a second sealing element
disposed about the periphery of the bottom of the gliding block.
Each of the first and the second sealing elements is formed with a
pressure-relief groove.
In another exemplary embodiment of the present disclosure, the
backflow-proof unit is substantially a baffle, and correspondingly,
there is a flange element, such as a C-shaped ring, disposed at the
top of the high-pressure via hole, to be used for barring the
baffle.
To sum up, the scroll compressor with improved floating apparatus
has at least the following advantages: (1) Since the contact area
between the gliding block and the medium-pressure chamber of the
fixed scroll is increased, resulting that the acting force exerting
upon the scroll pair by the gliding block is being distributed, not
only the stability of the dynamic operation of the scroll
compressor is enhanced, but also the operation performance is
increased. (2) As the high-pressure via hole of the gliding block
is designed as a via hole instead of the prior-art blind hole
design, the machining of the gliding block is comparatively easily,
not to mention that the backflow-proof unit in the present
disclosure is blocked and barred by the use of a ring element, such
as a C-shape ring, that can be assembled and mounted to the top of
the high-pressure via hole easily. (3) The sealing of the present
disclosure is improved by the sealing elements arranged respective
between the high-pressure chamber and the medium-pressure chamber,
and the medium-pressure chamber and the low-pressure zone. (4)
Since the gliding block is configured with the temperature
protection unit and the pressure protection unit, it can respond to
any abnormal high temperature and high pressure for activating a
pressure-drop operation and/or a temperature dissipating operation
accordingly in respective or simultaneously and thus the damage
protection for the scroll compressor is improved.
Further scope of applicability of the present application will
become more apparent from the detailed description given
hereinafter. However, it should be understood that the detailed
description and specific examples, while indicating exemplary
embodiments of the disclosure, are given by way of illustration
only, since various changes and modifications within the spirit and
scope of the disclosure will become apparent to those skilled in
the art from this detailed description.
BRIEF DESCRIPTION OF THE DRAWINGS
The present disclosure will become more fully understood from the
detailed description given herein below and the accompanying
drawings which are given by way of illustration only, and thus are
not limitative of the present disclosure and wherein:
FIG. 1 is a sectional view of a scroll compressor with improved
floating apparatus according to the present disclosure.
FIG. 2 is a sectional diagram showing a pressure protection unit
used in the present disclosure that is not activated.
FIG. 3 is a sectional diagram showing a pressure protection unit
used in the present disclosure that is being activated.
FIG. 4 is a sectional diagram showing a temperature protection unit
used in the present disclosure that is not activated.
FIG. 5 is a sectional diagram showing a temperature protection unit
used in the present disclosure that is being activated.
FIG. 6 is a sectional diagram showing an operating gliding block of
the present disclosure.
FIG. 7 is a sectional diagram showing a working sealing ring of the
present disclosure.
DESCRIPTION OF THE EXEMPLARY EMBODIMENTS
For your esteemed members of reviewing committee to further
understand and recognize the fulfilled functions and structural
characteristics of the disclosure, several exemplary embodiments
cooperating with detailed description are presented as the
follows.
Please refer to FIG. 1, which is a sectional view of a scroll
compressor with improved floating apparatus according to the
present disclosure. As shown in FIG. 1, the scroll compressor with
improved floating apparatus comprises: a frame 1, a partition block
2, a floating apparatus 3, a backflow-proof unit 301, a temperature
protection unit 31, a pressure protection unit 32, a scroll pair 4
and a bracket 5.
The frame 1 is configured with an inlet 10 and an outlet 11 and is
divided into a high-pressure zone 12 and a low-pressure zone 13 in
a manner that the high-pressure zone 12 is connected in
communication with the outlet 11 while the low-pressure zone 13 is
connected in communication with the inlet 10.
The partition block 2 is disposed inside the frame 1 at a position
between the high-pressure zone 12 and the low-pressure zone 13 for
separating the two. Moreover, the partition block 2 is configured
with a via hole 20, that is formed at the center thereof, and a
seal mounting surface 21.
The scroll pair 4 is composed of a fixed scroll 40 and a rotary
scroll 41, that are arranged convoluting each other while enabling
a low-pressure suction inlet 42, that is connected in communication
with the low-pressure zone 13, to be formed therebetween. Moreover,
the fixed scroll 40 is formed with a discharge port 401 at a
position on top of the hub thereof, and also, the fixed scroll 40
is further formed with a receiving recess 403 at a position on top
of the hub thereof, that is provided for receiving the floating
apparatus 3 therein. In addition, the fixed scroll is further
formed with a ring flange 404 at a position on top of the hub
thereof, and also the fixed scroll is further formed with a
medium-pressure passage 402.
The floating apparatus 3, being movably disposed between the scroll
pair 4 and the partition block 2, is composed of a gliding block
30, a first sealing element 33 and a second sealing element 34, in
which the gliding block 30 is mounted to the top of the fixed
scroll 40 while being received inside the receiving recess 403 for
enabling a high-pressure chamber 400 to be formed between the
gliding block 30 and the receiving recess 403 as well as a
medium-pressure chamber 43 to be formed between the gliding block
30 and the ring flange 404. In addition, as the discharge port 401
is arranged in communication with the high-pressure chamber 400,
the high-pressure chamber 400 is substantially connected in
communication respectively with the high-pressure zone 12 and the
low-pressure suction inlet 42. Moreover, As the medium-pressure
chamber 43 is formed in communication with the medium-pressure
passage 402, the medium-pressure chamber 43 is also capable of
communicating with the low-pressure suction inlet 42.
The top of the gliding block 30 is inserted into the via hole 20 to
be positioned inside the high-pressure zone 12, whereas the gliding
block 30 is further being configured with a high-pressure via hole
300 and a plurality of radial side holes 304.
There are a first pressure passage 305 and a second pressure
passage 308 being formed between the gliding block 30 and the
partition block 2 in a manner that the first pressure passage 305
is connected in communication with the second pressure passage 308
for allowing the low-pressure zone 13 and the high-pressure zone 12
to communicate with each other therethrough. Moreover, there are
two medium-pressure passages 306, 307 being formed in the gliding
block 30 at positions corresponding to the first pressure passage
305 for enabling the two medium-pressure passages 306, 307 to
connected in communication with the first pressure passage 305.
In addition, the first sealing element 33 is disposed at the bottom
of the gliding block 30 at a position proximate to the
high-pressure via hole 300, which is used for preventing the fluid
inside the high-pressure chamber 400 to leak into the
medium-pressure chamber 43. Similarly, the second sealing element
34 is also disposed at the bottom of the gliding block 30 about the
periphery thereof, which is used for preventing the fluid inside
the medium-pressure chamber 43 to leak into the low-pressure zone
13. As shown in FIG. 7, each of the sealing elements 33, 34 is
formed with a pressure relief groove, which are the pressure relief
groove 330 in the first sealing element 33 and the pressure relief
groove 340 in the second sealing element 34, by that cross section
of each sealing element 33, 34 is a U-shape cross section. Thereby,
the aforesaid high-pressure chamber 400 and the medium-pressure
chamber 43 can be formed from the assembling of the fixed scroll
40, the floating apparatus 3, the first sealing element 33 and the
second sealing element 34.
The backflow-proof unit 301 is substantially a baffle, movably
disposed inside the high-pressure via hole 300 while being
supported by a flange 302 also mounted inside the high-pressure via
hole 300, and correspondingly, there is a flange element 303, such
as a C-shaped ring, disposed at the top of the high-pressure via
hole 300 to be used for barring the backflow proof unit 301. It is
noted that each of the plural radial side holes 304 is connected in
communication with the high-pressure zone 12. In addition, the
gliding block 30 is formed with a ring flange mounting surface 35
that is extending axially and is coaxially arranged with the axis
of the high-pressure via hole 300, by that the seal mounting
surface 21 is arranged for enabling the same to engage with the
ring flange mounting surface 35 so as to construct the
abovementioned high-pressure zone 12 and the low-pressure zone
13.
The temperature protection unit 31, being disposed at a side of the
gliding block 30, is substantially temperature responsive valve
arranged between the medium-pressure passage 307 and the first
pressure passage 305 at a position proximate to the high-pressure
via hole 300. As shown in FIG. 4, the temperature protection unit
31 is composed of a block ring 310 and a disk-like valve element
311 made of a bimetallic material, in a manner that the ring block
310 is arranged at a position corresponding to a first pressure
passage 305 while the disk-like valve element 311 is disposed
inside the medium-pressure passage 307 to be used for selectively
opening or closing the same.
The pressure protection unit 32, being disposed at another side of
the gliding block 30, is substantially a pressure relief valve
being arranged between another medium-pressure passage 306 and the
first pressure passage 305. As shown in FIG. 2, the pressure relief
valve 32 is composed of a block element 320, an elastic element 322
and a spherical-shape element 323, in that the block element 320 is
formed with a stair-shaped hole 321 that is connected in
communication with the low-pressure zone 13 by way of the first
pressure passage 305; the elastic element 322, being a spring, is
disposed inside the block element 320 while enabling an end of the
elastic element 322 to abut against the inner wall of the
stair-shaped hole 321 and another end thereof to abut against the
spherical-shape element 323; and the spherical-shape element 323 is
disposed inside the medium-pressure passage 306 to be used for
selectively opening or closing the same. Moreover, the bracket 5,
being mounted inside the frame 1, is disposed at the bottom of the
scroll pair.
As shown in FIG. 6, a working fluid that is being fed into the
low-pressure zone 13 through the inlet 10 will be sucked into the
scroll pair 4 through the low-pressure suction inlet 42 so as to be
pressurized into a high-pressure fluid. Thereafter, the
high-pressure fluid will flow into the high-pressure chamber 400
through the discharge port 401 to be used for forcing the gliding
block 30 to move, resulting the seal mounting surface 21 to engage
with the ring flange mounting surface 35 and thus sealing the
second pressure passage 308. That is, the communication between the
high-pressure zone 12 and the low-pressure zone 13 is closed.
Simultaneously, the high-pressure fluid also flows into the
high-pressure via hole 300 for actuating the backflow-proof unit
301, resulting the radial side holes 304 to connect in
communication with the high-pressure chamber 400 so as to enable
the high-pressure fluid to flow into the high-pressure zone 12 and
then out of the same through the outlet 11.
If the high-pressure fluid in not powerful enough to drive the
gliding block 30, the gliding block will move back to its original
position for enabling the first pressure passage 305 to communicate
with the second pressure passage 308 as normal, and enabling the
seal mounting surface 21 to detach from contacting with the ring
flange mounting surface 35, i.e. the communication between the
high-pressure zone 12and the low-pressure zone 13 is recovered.
Simultaneously, the backflow-proof unit 301 is restored back to its
original position, resulting to the high-pressure via hole 300 to
be closed and thus preventing the high-pressure fluid that was fed
into the high-pressure zone 12 in the previous process from flowing
back into the high-pressure chamber 400.
As shown in FIG. 2 and FIG. 3, the fluid inside the medium-pressure
chamber 43 will be pressurized by the scroll pair 4 into a
so-called medium-pressure fluid, and if the pressure of the
medium-pressure fluid exceeds a specific pressure value, the
medium-pressure fluid will flow into the medium-pressure chamber 43
through the medium pressure passage 402 to be used for pushing the
spherical-shape element 323. Since the medium-pressure passage 306
is capable of communicating with the first pressure passage 305 by
way of the stair-shaped hole 321 of the block element 320, the
spherical-shape element 323 will be pushed away by the
medium-pressure fluid exceeding the specific pressure value,
resulting that the medium-pressure passage 306 is opened for
allowing the medium-pressure fluid to flow into the low-pressure
zone 13 through the medium-pressure chamber 43, causing the
pressure inside the scroll compressor to drop and thus protecting
the scroll compressor from being damaged by high pressure. As the
pressure is dropped, the spherical-shape element 323 will be pushed
back to its original position by the elastic element 322 and thus
the medium-pressure passage 306 is closed.
As shown in FIG. 4 and FIG. 5, when the temperature inside the
medium-pressure chamber 43 exceeds a specific threshold
temperature, the disk-like valve element 311 will be actuated to
open the medium-pressure passage 307 for enabling the
medium-pressure chamber 43 to communicate with the low-pressure
zone 13. That is, the disk-like valve element 311 will be deformed
to an extend sufficient enough at the threshold temperature for
opening the medium-pressure passage 307, and thus allowing the
medium-pressure fluid inside the medium-pressure chamber 43 to into
the low-pressure zone 13 through the medium-pressure passage 307,
resulting that the heat inside the scroll compressor is dissipated
as well as the pressure of the same is dropped, and thus the scroll
compressor is protected from being damaged by high temperature and
high pressure.
Please refer to FIG. 7, which is a sectional diagram showing a
working sealing ring of the present disclosure. Since the first
sealing element 33 is disposed between the high-pressure chamber
400 and the medium-pressure chamber 43, it is used primarily for
preventing the high-pressure fluid from leaking from the
high-pressure chamber 400 into the medium-pressure chamber 43; and
since the second sealing element 34 is disposed between the
medium-pressure chamber 43 and the low-pressure zone 13, it is used
primarily for preventing the fluid in the medium-pressure chamber
43 from leaking into the low-pressure zone 13. Operationally, when
the pressure relief grooves 330, 340 is subjected to the pressure
of a high-pressure fluid, the corresponding sealing elements 33 and
34 will be forced to stretched outward, resulting the two sealing
elements 33 and 34 to be able to provide a better sealing effect
for preventing any fluid leakage.
With respect to the above description then, it is to be realized
that the optimum dimensional relationships for the parts of the
disclosure, to include variations in size, materials, shape, form,
function and manner of operation, assembly and use, are deemed
readily apparent and obvious to one skilled in the art, and all
equivalent relationships to those illustrated in the drawings and
described in the specification are intended to be encompassed by
the present disclosure.
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